Radiator for hot-air furnaces.



No. sews. Patented Dec. 3|, 190:. n. A. MAY.

BADMTOR FOR HOT AIR FURNACES.

(Ayplica-tion filed Apr. 6, 1901.)

(In Model.)

PATENT RUDOLPH A. MAY,

RADIATOR FOR HO OF AKRON, OHIO.

T AIR FURNACES.

SPECIFIGATION forming part of Letters Patent No. 690,1 15, dated December 31, 1901.

Application filed April 6, 1901.

To all whom it nm l concern.-

Beit known that I, RUDOLPH A. MAY, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvementin Radiators for Hot-Air Furnaces, of which the followingis a full, clear, and exact description, reference being had to the accompanying drawings.

The invention relates to such radiators as form parts of hotairfurnaces. In a furnace having such a radiator the hot products of combustion pass from the combustion-chamber into and through the radiator, and thence to the chimney through the smoke-pipe. As heretofore constructed, such radiators choke the draft to a greater or less extent, and frequently do so to such an extent as to cause the furnace to smoke.

The primary object of my invention is to provide a radiator for hot-air furnaces which will not choke the draft, and therefore will not cause the furnace to smoke.

Another object is to provide a construction which is capable of radiating a large quantity of heat, but which will not be liable to wear out soon or be quickly injured by the heat incident to its use.

Figure 1 is a side elevation of a furnace embodying the invention, the upper part of said furnace and its radiator beingin vertical section. Fig. 2 is a sectional plan View on line 2 2 of Fig. 1. Fig. 3 is a perspective view of the upper plate of the radiator and parts integral therewith; and Fig. 4c is a verticalsectional view of the radiator in the plane indicated by the line 4 4 of Fig. 2.

Referring to the parts by letters and flgu res, A represents a hot-air furnace of any suitable construction, upon which is secured the structure in which the present invention is embodied. This structure includes a chamber B, which forms the upper part of the combustion-chamber of the furnace, and an annular radiator O, which surrounds the chamber B and communicates therewith through a lateral passage 1). The products of combustion entering the radiator through this passage flow in opposite directions around through the curved channels a c therein to the smoke-pipe opening 0. In these general particulars the construction shown is old.

Serial No, 54,732. (No model.)

The novel feature of my device, aside from its specific construction, which will be presently referred to, consists in the enlargement or widening of the radiator-chamber directly opposite such smoke-pipe opening. This enlarged part of the radiator-chamber is indicated by c and its cross-sectional area is preferably equal to or slightly greater than the combined cross-sectional area of the two curved channels 0 which are parts of the radiator-chamber. This enlarged part c of the radiator-chamber is separated from the combustion-chamber B by a single partition 3*, while intermediate of said combustionchamber and the curved channels a 0 there are two partitions 3 and an intervening airspace l The two currents of gas coming through the two curved channels 0 c meet and mingle in said enlargement c of the radiator-chamber. This enlargement c has sufficient capability to hold the volume of gas which results from the meeting of these two currents, and therefore the draft is not checked and the furnace does not smoke.

The radiator O and the upper end B of the combustion-chamber are parts of a single structure. It is not meant by that statement that they are necessarily parts of the same cast ing, although they might be. They are parts of the same structure in a sense that the various parts heretofore described may be assembled into a single easily-handled structure before being connected with the furnace A. In the specific construction shown this structure consists of three parts-viz. an outer sheet-metal drum 1 and two castings 2 and 3. The casting 2 consists of a circular plate 2 having a concentric opening 2 and two arc-shaped openings 2 Around the circular opening is a short downwardly-extended flange 2, which is fitted to the top of the furnace A, and on the upper side of said plate, around each areshaped opening and at the margin of the plate, are the grooved ribs or flanges 2 2 the grooves whereof forming cups for the reception of the lower edge of the drum 1 and of the lower edges of the flanges or partitions on the upper plate The upper casting consists of a circular plate 3 having arc-shaped openings corresponding with those in the lower plate, the curved partitions 3, which surround and extend down from the edges of said openings, and the curved partition 3', which extends between the inner edges of the said two openings 3 and joins the partitions 3 Around the margin of the top plate is the grooved flange 3 the groove of which serves as a cup to receive the upper edge of the drum 1. When these parts are assembled and connected with the furnace, as shown, a very cheap, durable, and efficient structure is produced, because the outer drum is of the best radiating material, while the other parts of the structure, some of which become very greatly heated, are made of material best adapted to withstand such heat and to have and maintain the necessary strength.

Having described my invention, I claim 1. The combination ofa hot-air furnace with a radiator structure secured upon said furnace and overhanging the same, which structure comprises, first, alower plate having a central opening, through which opening alone the products of combustion must pass from the combustion-chamber into the radiator, and on opposite sides thereof, two arc-shaped openings; second, a top plate having two corresponding arc-shaped openings; third,the'

partitions 3 which surround said arc-shaped openings and extend between said top and bottomplates and form air-tubes; fourth, a fixed vertical partition 3 extending between and connecting the inner parts of said partitions 3 and, fifth, an external drum 0 having a smoke-opening adjacent to said partition 3, substantially as and for the purpose specified.

2. In a hot-air furnace, the combination of a casting comprising a circular plate 2 having a substantially central cylindrical opening and two arc-shaped openings, a casting comprising a circular plate having two arc-shaped openings, depending partition-flanges 3 surrounding said opening, and a partition-flange 3 which extends between the flanges 3 and is substantially a continuation of the inner wall thereof, and a sheet-metal drum secured between said plates near their marginal edges and having a smoke-opening, substantially as and for the purpose specified.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

' R. A. MAY. Witnesses:

F. B. THEISS, VESTA L. DE LAND. 

